DN 20 ASME B16.5 Plate Flange & Blind Flange Dimensions
DN 20 (3/4") to ASME B16.5: OD 98.4 mm; PCD 69.9 mm; bolts 4; holes 15.9 mm; raised face 42.9 mm.
Key to dimensions
- D
- Outside diameter of flange
- B
- Bore (inside diameter) of plate flange
- C
- Flange thickness — plate or blind, raised face (RF) or flat face (FF)
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolt holes
- L
- Bolt hole diameter
- d1
- Raised face diameter
- f
- Raised face height
DN 20 ASME B16.5 Plate Flange & Blind Flange Dimensions — all dimensions
ASME B16.5 Class 150 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 98.4 mm | 3.87 in |
| Bolt circle — K | 69.9 mm | 2.75 in |
| Number of bolts | 4 | |
| Hole dia — L | 15.9 mm | 0.626 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 1.6 mm | 0.063 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 12.7 mm | 0.500 in |
| Plate, FF — C | 11.1 mm | 0.437 in |
| Blind, RF — C | 12.7 mm | 0.500 in |
| Blind, FF — C | 11.1 mm | 0.437 in |
ASME B16.5 Class 300 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 117.5 mm | 4.63 in |
| Bolt circle — K | 82.6 mm | 3.25 in |
| Number of bolts | 4 | |
| Hole dia — L | 19.1 mm | 0.752 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 1.6 mm | 0.063 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 15.9 mm | 0.626 in |
| Plate, FF — C | 14.3 mm | 0.563 in |
| Blind, RF — C | 15.9 mm | 0.626 in |
| Blind, FF — C | 14.3 mm | 0.563 in |
ASME B16.5 Class 400 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 115 mm | 4.53 in |
| Bolt circle — K | 82.6 mm | 3.25 in |
| Number of bolts | 4 | |
| Hole dia — L | 19.1 mm | 0.752 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 6.4 mm | 0.252 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 22.3 mm | 0.878 in |
| Plate, FF — C | 15.9 mm | 0.626 in |
| Blind, RF — C | 22.3 mm | 0.878 in |
| Blind, FF — C | 15.9 mm | 0.626 in |
ASME B16.5 Class 600 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 115 mm | 4.53 in |
| Bolt circle — K | 82.6 mm | 3.25 in |
| Number of bolts | 4 | |
| Hole dia — L | 19.1 mm | 0.752 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 6.4 mm | 0.252 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 22.3 mm | 0.878 in |
| Plate, FF — C | 15.9 mm | 0.626 in |
| Blind, RF — C | 22.3 mm | 0.878 in |
| Blind, FF — C | 15.9 mm | 0.626 in |
ASME B16.5 Class 900 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 130 mm | 5.12 in |
| Bolt circle — K | 88.9 mm | 3.50 in |
| Number of bolts | 4 | |
| Hole dia — L | 22.2 mm | 0.874 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 6.4 mm | 0.252 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 31.8 mm | 1.25 in |
| Plate, FF — C | 25.4 mm | 1.00 in |
| Blind, RF — C | 31.8 mm | 1.25 in |
| Blind, FF — C | 25.4 mm | 1.00 in |
ASME B16.5 Class 1500 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 130 mm | 5.12 in |
| Bolt circle — K | 88.9 mm | 3.50 in |
| Number of bolts | 4 | |
| Hole dia — L | 22.2 mm | 0.874 in |
| Raised face — d1 | 42.9 mm | 1.69 in |
| RF height — f | 6.4 mm | 0.252 in |
| Bore — B | 27.7 mm | 1.09 in |
| Plate, RF — C | 31.8 mm | 1.25 in |
| Plate, FF — C | 25.4 mm | 1.00 in |
| Blind, RF — C | 31.8 mm | 1.25 in |
| Blind, FF — C | 25.4 mm | 1.00 in |
Values are nominal, from ASME B16.5 Plate Flange & Blind Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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DN 20 ASME B16.5 Plate Flange & Blind Flange Dimensions: common questions
What are the DN 20 ASME B16.5 Plate Flange & Blind Flange Dimensions?
DN 20 (3/4") to ASME B16.5: OD 98.4 mm; PCD 69.9 mm; bolts 4; holes 15.9 mm; raised face 42.9 mm.
Does Teshi Group manufacture DN 20 flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to ASME B16.5, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the DN 20 dimensions as a PDF?
Yes. Use “Download PDF for this size” on this page to get a single-size, print-ready PDF with the drawing and every tabulated dimension, or download the full ASME B16.5 Plate Flange & Blind Flange Dimensions chart.
Need DN 20 flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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